CN102723602A - Automatic satellite finding method and satellite finding device - Google Patents
Automatic satellite finding method and satellite finding device Download PDFInfo
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- CN102723602A CN102723602A CN2012102198554A CN201210219855A CN102723602A CN 102723602 A CN102723602 A CN 102723602A CN 2012102198554 A CN2012102198554 A CN 2012102198554A CN 201210219855 A CN201210219855 A CN 201210219855A CN 102723602 A CN102723602 A CN 102723602A
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Abstract
The invention discloses an automatic satellite finding method and a satellite finding device. The automatic satellite finding method includes utilizing a DisEqc command controller (1) in the automatic satellite finding device as an information processing and controlling core to control rotating of an antenna motor, acquiring satellite signals that the rotating position of the motor corresponds to from a signal wire connected with a low noise bock (LNB) through a signal strength reading module (2) and measuring and calculating strength of the signals and judging whether the signal strength is the optimum signal strength or not to achieve automatic satellite finding. In addition, a shock sensor (4) and a gravity sensor (5) are further used in the automatic satellite finding process to acquire rotating state and rotating angle of the motor and feed back the information to a set top box for display in real time through a wireless transmitting and receiving module (7 and 8), so that the set top box can efficiently and sensitively control the antenna motor. The method and the device further have the advantages that the set top box can automatically find a plurality of target satellites by sending a satellite finding command only once.
Description
Technical field
The present invention relates to the star technology of seeking of DTV satellite, more particularly, relate to a kind of automatic star-seeking method and satellite-finding device.
Background technology
For the digital satellite television user, accurately and seek out easily the satellite-signal that will receive be very important.All one-way transmission order in coaxial cable below DiSEqC 1.3 agreements, the antenna revolution of control receiving satellite signal, though DiSEqC 2.0 agreements have the function of two-way control, price is too high.It is existing that end increases the equipment that some detect curtage in the source of STB firing order based on the technology below DiSEqC 1.3 agreements; Thereby the rotation situation that detects satellite antenna is controlled the purpose that motor changes or stops; Thereby the realization automatic star-seeking, but this automatic star-seeking method efficient is very low, and sensitivity is very poor; Once can only seek a satellite, not reach STB and start the purpose of seeking this half a day of all satellites under the situation of once seeking the astrology order automatically.In addition, these technology will be transformed the hardware of STB, do not meet principle easy to use, can not carry out upgrading easily to existing STB.
Summary of the invention
The technical problem that the present invention will solve is, to the above-mentioned technological deficiency of prior art, a kind of automatic star-seeking method and satellite-finding device is provided.
The present invention solves its technical problem and adopts following technical scheme.
Automatic star-seeking method of the present invention, satellite-finding device send to seeking the astrology order of STB from the user in advance, obtain the single frequency of target satellite, preset signal strength signal intensity, and this automatic star-seeking method comprises:
S1) said satellite-finding device control antenna revolution;
S2) judge under the current turned position of antenna motor whether successfully receive the signal of the single frequency of said target satellite, if the signal strength signal intensity of obtaining and preset signal strength signal intensity and the signal strength signal intensity of last time obtaining are compared; If not, execution in step S1 then);
S3) confirm to judge whether the current turned position of antenna motor is satellite-signal intensity optimum according to above-mentioned comparative result, if said satellite-finding device control antenna motor stops operating, and the searching result of this satellite of mark; If not, execution in step S1 then).
The present invention also provides a kind of satellite-finding device that is applied to said method; This satellite-finding device comprises: the DisEqC instruction control unit; Be coupled to the coaxial cable that STB is connected with the antenna motor; Based on DisEqC 1.3 following agreement control antenna revolution, storage target satellite characteristic and searching result, said target satellite characteristic comprises single frequency and preset signal strength signal intensity; The signal strength signal intensity read module is connected with tuner LNB and DisEqC instruction control unit on being installed in satellite antenna, from the holding wire that connects LNB, obtains the signal under the target satellite frequency and calculates its signal strength signal intensity; Signal strength signal intensity is module relatively; Be connected with DisEqC instruction control unit and signal strength signal intensity read module; Access signal strength signal intensity last time compares the current signal strength signal intensity of obtaining and signal strength signal intensity last time and the signal strength signal intensity of presetting, and comparative result is fed back to the DisEqC instruction control unit.
The automatic star-seeking method of embodiment of the present invention and be applied to the satellite-finding device of this method has following beneficial effect: 1) in DisEqC 1.3 following agreements, realize high efficiency automatic star-seeking; 2) state of monitoring aerial revolution in real time in the automatic star-seeking process, and to its efficient and sensible control; 3) device can be inserted and can pull out, and is easy for installation; 4) STB sends a subcommand and can seek multi-satellite automatically, and STB need not with the antenna motor mutual repeatedly in the searching process.
Description of drawings
To combine accompanying drawing and embodiment that the present invention is described further below, in the accompanying drawing:
Fig. 1 is the schematic flow sheet of the method for automatic star-seeking described in the embodiment of the invention;
Fig. 2 is the structural representation of satellite-finding device described in the embodiment of the invention.
Embodiment
As shown in Figure 1, the automatic star-seeking method described in the first embodiment of the present invention, this method may further comprise the steps:
Wherein in step 103,, then represent this target satellite not exist, this target satellite is labeled as sky if antenna revolution whole process does not all detect the signal of target satellite.Adopt automatic star-seeking method described in this embodiment, realized the high efficiency automatic star of seeking.
Automatic star-seeking method described in the second embodiment of the invention is as shown in Figure 1 for another example, with respect to automatic star-seeking method described in first embodiment, between above-mentioned steps 102 and step 103, also comprises the steps:
In addition; In the described in this embodiment automatic star-seeking method; Said step 101 also comprises the extreme angles that is provided with in advance and obtains the antenna revolution; With respect to first embodiment of the invention, the advantage of this embodiment also comprises the rotation situation of the real-time control antenna motor of STB, and limit rotational angle is set has further improved and seek star efficient.
And for example, as shown in Figure 1 in the automatic star-seeking method described in the third embodiment of the invention, with respect to automatic star-seeking method described in first and second embodiment, after step 105, may further comprise the steps:
Above-mentioned the 3rd embodiment is a preferred embodiment with respect to first and second embodiment; Its said automatic star-seeking method not only realizes automatic star-seeking based on satellite-finding device; In seeking the star process, realize the real-time control of STB to the antenna motor; The rotation information of antenna motor is sent to STB show in real time, and STB only need send and once seeks the astrology order and can seek many target satellites automatically.
In embodiments of the present invention said is applied in the satellite-finding device of above-mentioned automatic star-seeking method; What the antenna motor was selected for use is the standard antenna motor; All can based on DisEqC 1.2 or DisEqC 1.3 agreements; As shown in Figure 2, be the structural representation of satellite-finding device in the embodiment of the invention, the satellite-finding device among this embodiment comprises:
DisEqC instruction control unit 1; Be coupled in STB and the coaxial cable that antenna motor 1 is connected through plugging interface arrangement; Be used for the rotation of control antenna motor; Storage target satellite characteristic and searching result, said characteristic comprises single frequency of target satellite and preset signal strength signal intensity, said searching result comprises optimal antenna revolution position and optimum signal intensity;
Signal strength signal intensity read module 2; Be connected with LNB, from the holding wire that connects LNB, obtain the target satellite signal, and the single frequency that is provided with according to DisEqC instruction control unit 1 carries out mixing and filtering; To the signal measuring and calculating signal strength signal intensity of this single frequency, unit presses dbm and calculates then;
Signal strength signal intensity is module 3 relatively, from signal strength signal intensity read module 2, reads signal strength signal intensity and storage, and itself and the signal strength signal intensity of last time and the signal strength signal intensity of presetting are compared, and the result is fed back to DisEqC instruction control unit 1.
Adopt satellite-finding device described in the foregoing description success to realize automatic star-seeking based on DisEqC 1.3 following agreements.
And for example the satellite-finding device in the fifth embodiment of the invention is as shown in Figure 2, also comprises following structure with respect to the satellite-finding device among the 4th embodiment:
Shock sensor 4; Consider that motor vibration is relatively obvious; Select low-cost low precision shock sensor in the present embodiment for use, and in practical application, motor base, motor does not have seismaesthesia when not rotating; Even blowing and raining can not cause motor vibration yet, thereby shock sensor is fixed on the motor base.This shock sensor can send the signal of telecommunication and give DisEqC instruction control unit 1 when vibrations take place, and particularly, transducer sent " 1 " signal when vibrations were arranged, and transducer sends " 0 " signal when not shaking.
Gravity sensor 5 uses common gravity sensor, is fixed on the motor shaft, and center line is parallel with motor shaft, and when motor shaft rotated, the drift angle of center line and vertical line can change, and reflected the rotary state of motor in real time.When gravity sensor 5 is installed; Sensor internal has one all the time perpendicular to the perpendicular bisector of the earth, and this moment sensor internal the position graticule angle can be arranged with the perpendicular bisector perpendicular to the earth, this angle generally is not 0; Be recorded as B to this drift angle this moment; Simultaneously when transducer during along with motor shaft turn, the position graticule of sensor internal and angle real-time change perpendicular to the perpendicular bisector of the earth, this angle is recorded as C.
Corner computing module 6 obtains the drift angle from gravity sensor 5, the actual rotation angle D=|B-C| that calculates motor according to preset motor and transducer installation site, and actual rotation angle D is sent to DisEqC instruction control unit 1;
Wireless transmitter module 7 is connected with DisEqC instruction control unit 1, and the packing data of being responsible for DisEqC instruction control unit 1 is write is also launched through lightweight wireless receiving and dispatching agreement, such as ZigBee etc.;
Wireless receiving module 8 is connected with STB, is responsible for being transferred to STB through USB interface through the data that wireless transmitter module 7 launches, and uses and the same wireless receiving and dispatching agreement of wireless transmitter module;
Ultimate angle is provided with module 9, relatively when corner computing module 6 obtains actual drift angle A, whether reaches the extreme angles of the revolution that is provided with the module, gives notice to DisEqC instruction control unit 1 if reach.
The concrete function of the DisEqC instruction control unit 1 in satellite-finding device described in the 5th embodiment comprises as follows:
Seek astrology when making when what from antenna motor and coaxial cable that STB is connected, get access to STB; DiSEqC instruction control unit 1 is provided with the typical frequencies of target satellite for the signal strength signal intensity read module; And send order to motor simultaneously; Make revolution, at this moment, whether send to STB to revolution through wireless module in real time with the rotation drift angle.
When signal strength signal intensity comparison module 3 got access to legal signal strength signal intensity, DiSEqC instruction control unit 1 stopped revolution.
After detecting motor through shock sensor 4 and stopping, reading relatively module 3 of signal strength signal intensity once more, if signal intensity ratio was strong just now, then according to the minimum step rotation motor, one step of revolution stops, and intensity relatively, finds the signal point of maximum intensity; If signal intensity ratio just now a little less than, then reverse motor, revolution one step stops, and finds the signal strength signal intensity point of maximum intensity.
After finding the signal strength signal intensity point of maximum intensity, to motor the satellite markers of this satellite is set, and deposits this satellite markers in DiSEqC instruction control unit 1.
When more than one of target satellite, continue from the frequency tabulation of DiSEqC instruction control unit 1, to read the characteristic frequency of next satellite, signalization intensity read module 2, and rotation motor.Repeat top three steps, till ultimate angle is provided with warning.In this process, transmit the revolution situation in real time and rotate corner.
After all satellites had all been sought, DiSEqC instruction control unit 1 was given STB satellite position list and each frequency signal strength signal intensity through wireless sending module 7 passbacks.
Satellite-finding device described in the fifth embodiment of the invention is a preferred embodiment with respect to the 4th embodiment, except easy for installation, can insert and can pull out; Also obtain the rotary state and the rotational angle of antenna motor, and through wireless transmitter module 7 and wireless receiving module 8 rotation situation of above-mentioned antenna motor is sent to STB and show in real time through shock sensor 4 and gravity sensor 5; And be provided with ultimate angle warning is set, improved and sought star efficient.
Thus, based on automatic star-seeking method in the 3rd preferred embodiment of the present invention and the satellite-finding device in the 5th preferred embodiment, come the process of the automatic star-seeking of more detailed elaboration automatic star-seeking method of the present invention and satellite-finding device.
Such as seeking a satellite that 1200 MHZ frequencies after the LNB frequency reducing are arranged.At first, STB 3 is passed to DiSEqC instruction control unit 1 to the single frequency of satellite through coaxial cable, passes to the signal strength signal intensity that also has this satellite to preset of DiSEqC instruction control unit 1 simultaneously; Be assumed to be-50 dbm, and transmit the ultimate angle of antenna motor, be assumed to be 80 °; DiSEqC instruction control unit 1 is when receiving these data; Generate a preset list item { 1200 MHZ ,-50 dbm, 80 ° }; Then, DiSEqC instruction control unit 1 has been received this string command, and at this moment, DiSEqC instruction control unit 1 begins to let the antenna revolution.
The antenna motor is when rotating; Shock sensor 4 constantly detects vibrations, sends " 1 " signal constantly for DiSEqC instruction control unit 1, and DiSEqC instruction control unit 1 is after receiving " 1 " signal; Just rotating this situation to the antenna motor and sending to wireless receiving module 8 through wireless transmitter module 7; STB receives the situation that motor is rotating through the USB interface bed from wireless receiving module 8, and is presented at this situation on the screen, makes the user learn.
Simultaneously; In the antenna revolution; The change of the position of gravity sensor 5 rotating shaft during and constantly changing along with revolution, then the corner that provides of gravity sensor 5 just constantly changes, and the angle after calculating through corner computing module 6 then is identical with the actual rotation angle of motor; This angle is constantly issued DiSEqC instruction control unit 1 by corner computing module 6; DiSEqC instruction control unit 1 then sends to wireless receiving module 8 to this angle through wireless transmitter module 7 in real time, and STB receives the situation that the motor corner changes through wireless receiving module 8, and is presented at this situation on the screen; Make the user learn, when user's cacesthesia, can interrupt this process at any time.
Suppose the rotation toward east at present; Corner has turned to 80 °, in whole rotation process, does not receive simultaneously the signal of 1200 MHZ, and then ultimate angle is provided with module 9 and obtains after this rotational angle; Compare with the extreme angles of the rotation that is provided with in advance; The angle if discovery actual rotation angle has reached capacity is then notified DiSEqC instruction control unit 1, and DiSEqC instruction control unit 1 stops the antenna motor at once after receiving alert notice; And say the word to motor again, make the antenna motor begin to rotate in the opposite direction.
In antenna revolution process, signal strength signal intensity read module 2 through with holding wire that LNB is connected in read the signal after the LNB frequency conversion because the signal of preset 1200 MHZ is a frequency point information of this satellite; Then the signal strength signal intensity of 1200 MHZ on 2 signal lines of signal strength signal intensity read module supposes that the signal strength signal intensity that reads 1200 MHZ frequencies this moment is-60 dbm, motor rotation westerly simultaneously; Because-60 dbm are less than-50 preset dbm signal strength signal intensities when the signal strength signal intensity that this moment, signal strength signal intensity equaled to preset (if, then expression finds satellite, signal strength signal intensity comparison module 3 just to notify DiSEqC instruction control unit 1 to let the antenna motor just stop operating); Signal strength signal intensity comparison module 3 is not notified DiSEqC instruction control unit 1, and then motor is rotated further, and is-59 dbm if next detect a signal strength signal intensity again; Because less than-50 dbm, then signal strength signal intensity comparison module 3 is not notified DiSEqC instruction control unit 1 to-59 dbm yet greater than-60 dbm, motor continues rotation westwards; Be-60 dbm if detect signal strength signal intensity again; Can know that then-59 dbm are the signal point of maximum intensity, then signal strength signal intensity comparison this moment module 3 notice DiSEqC instruction control units 1 let the antenna motor stop the rotation earlier, and flyback is pressed the minimum step rotation toward east then; In this process, constantly read signal strength signal intensity; When signal strength signal intensity equaled-59 dbm again, signal strength signal intensity comparison module 3 notice DiSEqC instruction control units 1 stopped motor, and current location is set is mark " 1 "; This position deposits in the motor; DiSEqC instruction control unit 1 leaves a result's list item { 1200 MHZ, " 1 " ,-59 dbm} at this moment.
If do not detect the signal that frequency is 1200 MHZ after rotating to 80 ° of ultimate angles westerly yet; The whole process that then is illustrated in the antenna rotation does not all detect the signal of this target satellite; Then represent this satellite not exist; DiSEqC instruction control unit 1 will be sought as a result, and list item is stored as { 1200 MHZ, " NULL ", " NULL " }.
Then, DiSEqC instruction control unit 1 begins to get into the search of the pairing target satellite of next preset table.After all corresponding target satellites are all searched for completion in the preset table; DiSEqC instruction control unit 1 with all searchings as a result table send to wireless receiving module 8 through wireless transmitter module 7, STB obtains as a result just can carrying out the various operations relevant with target satellite after the table through wireless receiving module 8.
By on can find out, based on the present invention the 3rd and the 5th preferred embodiment, in the process of automatic star-seeking; There are two feedback procedures; One is the feedback of antenna revolution state and antenna motor corner, and one is the list item feedback that comprises the Search Results of signal strength signal intensity, and previous feedback is real-time transmitted to STB when seeking star; The feedback in back is after seeking the completion of star process, once all feeds back to STB.STB and user reasonably use these two feedbacks promptly can increase user experience well, reach the purpose of automatic star-seeking.
The above for the person of ordinary skill of the art, can make other various corresponding changes and distortion according to technical scheme of the present invention and technical conceive, and all these changes and distortion all should belong to the protection range of claim of the present invention.
Claims (9)
1. an automatic star-seeking method is characterized in that, satellite-finding device sends to seeking the astrology order of STB from the user in advance, obtains the single frequency of target satellite, preset signal strength signal intensity, and this automatic star-seeking method comprises:
S1) said satellite-finding device control revolution;
S2) judge under the current turned position of antenna motor whether successfully receive the signal of the single frequency of said target satellite, if the signal strength signal intensity of obtaining and preset signal strength signal intensity and the signal strength signal intensity of last time obtaining are compared; If not, execution in step S1 then);
S3), judge whether the corresponding signal strength signal intensity in the current turned position of antenna motor is satellite-signal intensity optimum, if said satellite-finding device control motor stops operating, and the searching result of this satellite of mark according to above-mentioned comparative result; If not, execution in step S1 then).
2. automatic star-seeking method according to claim 1 is characterized in that, at step S1) and S2) between also comprise:
A1) said satellite-finding device obtains antenna revolution parameter, and said rotational parameters comprises: the sign whether the antenna motor rotates and the angle of rotation;
A2) said satellite-finding device is wirelessly sent to STB with above-mentioned rotational parameters and shows in real time.
3. automatic star-seeking method according to claim 2 is characterized in that, at step S1) also comprise step S0 before), the extreme angles of antenna revolution is set in advance; Then in steps A 2) after, also comprise A3), judge whether antenna revolution angle reaches preset extreme angles, is, control antenna motor counter-rotation; , the antenna motor does not continue to rotate with former direction.
4. automatic star-seeking method according to claim 1 is characterized in that, when more than one of target satellite, also comprises step S4), said satellite-finding device judges whether all target satellites have all sought completion, is will seek the result and be wirelessly sent to STB; Deny, then execution in step S1).
5. a satellite-finding device that is applied to the said method of claim 1 is characterized in that, this satellite-finding device comprises:
DisEqC instruction control unit (1); Be coupled to the coaxial cable that STB is connected with the antenna motor; Based on DisEqC 1.3 following agreement control antenna revolution, storage target satellite characteristic and searching result, said target satellite characteristic comprises single frequency and preset signal strength signal intensity;
Signal strength signal intensity read module (2) is connected with tuner LNB and DisEqC instruction control unit (1) on being installed in satellite antenna, from the holding wire that connects LNB, obtains the signal under the target satellite frequency and calculates its signal strength signal intensity;
Signal strength signal intensity is module (3) relatively; Be connected with DisEqC instruction control unit (1) and signal strength signal intensity read module (2); Access signal strength signal intensity last time; The current signal strength signal intensity of obtaining and signal strength signal intensity last time and the signal strength signal intensity of presetting are compared, and comparative result is fed back to the DisEqC instruction control unit.
6. satellite-finding device according to claim 5 is characterized in that, said satellite-finding device also comprises: shock sensor (4), be installed on the antenna motor, and be connected with the DisEqC instruction control unit, whether the sensing motor rotates; Gravity sensor (5) is fixed on the antenna motor, sensing revolution angle; Corner computing module (6) is connected with gravity sensor and DisEqC instruction control unit, and the actual angle of calculating and sending antennas revolution is to the DisEqC instruction control unit; Wireless transmitter module (7) is connected with the DisEqC instruction control unit, is used for sending DisEqC instruction control unit canned data to STB, and said information comprises the searching result of revolution parameter and target satellite; Wireless receiving module (8) is connected with STB, is used to receive the information of wireless transmitter module transmission and be transferred to STB.
7. satellite-finding device according to claim 6; It is characterized in that; Said satellite-finding device comprises further that also ultimate angle is provided with module (9); Be connected with corner computing module and DisEqC instruction control unit, whether the actual angle that is used for the extreme angles of antenna revolution being set in advance and judging its rotation reaches said extreme angles.
8. satellite-finding device according to claim 6 is characterized in that, said satellite-finding device also comprises the interface that wireless receiving module (8) is connected with STB, and said interface comprises USB interface.
9. satellite-finding device according to claim 5 is characterized in that, said satellite-finding device also comprises the plugged interface that DisEqC instruction control unit (1) and coaxial cable are coupled.
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| CN201210219855.4A CN102723602B (en) | 2012-06-29 | 2012-06-29 | Automatic satellite finding method and satellite finding device |
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